Re: [RFC 0/5] of: Automatic console registration cleanups

From: Grant Likely
Date: Mon Mar 31 2014 - 05:41:40 EST

On Mon, 31 Mar 2014 09:10:15 +0200, Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote:
> On Fri, Mar 28, 2014 at 09:08:00AM -0700, Grant Likely wrote:
> > Hi all,
> >
> > This is a series that I've been playing with over the last few days to
> > clean up the selection of default console devices when using the device
> > tree. The device tree defines a way of specifying the console by using a
> > "stdout-path" property in the /chosen node, but very few drivers
> > actually attempt to use that data, and so for most platforms there needs
> > to be a "console=" line in the command line if a serial port is intended
> > to be used as the console.
> >
> > With this series, if there is a /chosen/stdout-path property, and if
> > that property points to a serial port node, then when the serial driver
> > registers the port, the core uart_add_one_port() function will notice
> > and if no console= argument was provided then add it as a preferred
> > console.
> >
> > I've not tested this very extensively yet, but I want to get some
> > feedback before I go further.
> I gave it a test on i.MX. It works as expected with both
> linux,stdout-path and stdout-path. Specifying a console on the
> commandline still works and overrides the devicetree setting.
> Tested-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>

Brilliant! Thanks Sascha.

Can you supply a patch to add stdout to the imx dts files?


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